RS422 / RS485 Shield for Arduino

Professional RS422/485 Interface Extension for Arduino Uno

The Arduino shield is a de-facto standard for extension boards not only for the Arduino but also for demoboards and SBC of different manufacturers. A good reason to create for the Arduino a RS422
/ RS485 extension in the same style as our RS485 HAT for Raspberry Pi.

Some RS485 shields for the Arduino are already available on the market, but these extensions are not suitable for professional use, because they come without a galvanic isolation between the
RS485 bus and the Arduino. Without such isolation a damaging of the Arduino or malfunction of the device is possible, because of the large distances of a RS485 bus. Furthermore a full-duplex mode
(RS422) is also not integrated.

Our shield comes with a lot of additional features:

RS485 mode (half duplex)

RS422 mode (full duplex)

galvanic isolation between Arduino and connected RS485 bus

free choice of TX-pin between pins 0-5

free choice of RX-pin between pins 0-5

enhanced ESD protection

adjustable automatic transceiver switching for RS485 mode

adjustable control of transceiver/receiver via pin 6 or 7

adjustable Pull-Up, Pull-Down und terminating resistors

indicator LEDs for RX and TX

removable block terminal for bus connection

many options adjustable via DIP switches

stackable headers

can be configured for 3.3V and 5V logic

The RS485 is in use in many applications like industrial and home automation (for example MODBUS), lighting control (DMX), video surveillance (for example Pelco D) ...

If you like to know more about RS485 visit this website: http://www.radio-electronics.com/info/telecommunications_networks/rs485/rs-485-tutorial-basics.php